Swinging cement applying mechanism

ABSTRACT

A cement spraying nozzle that is swingable through a prescribed arc and is effective to spray cement while swinging through an adjustable angle after it has begun to swing and before it terminates its swinging.

United States Patent Vornberger 145] Sept. 26, 1972 SWINGING CEMENTAPPLYING [56] References Cited MECHANISM N UN D ES TE T [72} Inventor:Karl F. Vornberger, Tewksbury, [TE STAT PA S Mass. 2,857,201 10/1958Palmer ..239/587 x 1,687,178 10/1928 Peterson ..239/225 X 1731 AsslgnwJmb Kamborian, West Newton. 2,039,769 5/1936 Bird ..239/97 Mass2,728,639 12/1955 Ransburg ..239/97 X 22 i March 1 1971 2,964,24612/1960 Alholm et a1. ..239/97 X 2,979,271 4/1961 Boyden ..239/DIG. 11211 Appl. No.: 124,891

FOREIGN PATENTS OR APPLICATIONS Appumm" Dam 959,817 4/1950 France ..118/300 Division of Ser. No. 41,500, May 28, 1970, Pat. Nov 3,609,785.

U.S. CI. ..239/97, 239/236,, 239/242 Int. Cl. ..B05b 3/00 Field 01'Search.....239/D1G. l, 97, 99, 225, 537,

Primary Examiner-M. Henson Wood, Jr. Assistant Examiner-Edwin D. GrantAttorney-Albert Gordon [57] ABSTRACT A cement spraying nozzle that isswingable through a prescribed arc and is effective to spray cementwhile swinging through an adjustable angle after it has begun to swingand before it terminates its swinging.

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sum IOGF 10 SWINGING CEMENT APPLYING MECHANISM This is a division ofapplication Ser. No. 4l ,500 filed May 28, 1970, now US. Pat. No.3,609,785.

in a shoe lasting operation, when causing wiping means to wipe the heelportion of an upper margin against an insole and bond the wiped uppermargin to the insole by cement, it is conventional to apply cement intothe angle formed between the upper margin and the periphery of theinsole prior to the heel wiping operation. The length of the uppermargin that is to be bonded to the insole by the wiping means, andtherefore the length of the upper margin and/or insole periphery to beapplied with cement, is proportional to the length of the shoe assembly.This invention relates to a cement applying mechanism thatcan apply anadjustable length of cement to the upper margin and/or insole periphery.This mechanism comprises a nozzle that is swingable through a prescribedarc and an arrangement for not spraying cement from the nozzle at thebeginning and at the end of the swinging movement of the nozzle and forspraying cement from the nozzle while the nozzle is swinging through anadjustable angle after it has begun to swing and before it terminatesits swinging.

in the drawings:

FIG. 1 is a side elevation of a heel lasting machine that incorporatesthe cement applying mechanism;

FIG. 2 is a front elevation of the machine taken on the line 22 of FIG.1;

FIG. 3 is a side elevation of an applicator-hold-down unit in themachine;

FIG. 4 is a plan view taken on the line 4-4 of FIG. 3',

FIG. 5 is an elevation of the cement applying mechanism;

H0. 6 is a view taken on the line 6-6 of FIG. 5;

FIG. 7 is a view taken on the line 7-7 of FIG. 5',

FIG. 8 is a view taken on the line 8--8 of FIG. 6;

PK]. 9 is a section of a motor for swinging the nozzle taken on the line9-9 of FIG. 3',

FIG. 10 is a section of a cement melting and pumping mechanism;

FIG. 11 is a representation of a shoe assembly as it appears in themachine during the cement spraying operation, and

HO. HA is a view taken on the line llA-llA of FIG. 1 1.

Referring to H08. 1 and 2, the machine includes a shoe assemblysupporting mount 10 and heel wipers 12. The machine is inclined so thatthe plane in which the wipers lie is inclined from the horizontal andthe longitudinal axis of the mount i0 is inclined from the vertical tofacilitate accessibility of the machine to the operator. For ease ofexplanation, the plane in which the wipers l2 lie will be considered tobe horizontal and the longitudinal axis of the mount 10 will beconsidered to be vertical. in operating the machine, the operator standsto the left of the machine as seen in FIG. 1, and directions that extendtoward the operator will be described as forward while directions thatextend away from the operator will be described as rearward A column 46,located forwardly of the mount it), has a toe rest 110 mounted to itstop. A last support plate 148 (FIG. 11) is mounted to the top of themount 10 and a last pin 150 is secured to and extends upwardly of theplate 148. A head 152 is mounted rearwardly of the mount 10. A U-shapedheel clamping pad 172 and the wipers 12 are mounted to the head 152 forforwardrearward movement. A block 228 is mounted to the head 152.

Referring to FIGS. 3-8, an applicator-hold-down unit 235 is mounted tothe block 228. The unit 235 comprises a rod 236 that is secured to andextends downwardly of the block 228. A housing 238 is secured to thebottom of the rod 236. A flange 239 is secured to the housing 238, and aspindle 240 extends downwardly of the flange 239. The bottom of thespindie 240 is formed into a hold-down foot 242. A pair of hold-downfeet 244 (see also FIG. 2) are mounted to and depend from the housing238 and are located forwardly of the foot 242. A plate 246 is slidablymounted for forward-rearward movement in gibs 248 formed in the flange239.

A bolt 250 is threaded into a lug 252 that extends from a plate 254, theplate 254 being secured to the bottom of the flange 239. A stem 256,secured to the plate 246, extends between a pair of collars 258 formedon the bolt 250. The rotation of the bolt 250, by a knob 260 securedthereto, thus effects forward-rearward movement of the plate 246.

The bottom of the plate 246 is formed into regions 262 and 264, theregion 262 being at a higher elevation than the regions 264. The regions262 and 264 are separated by inclined regions 266 that divergerearwardly and outwardly along the plate 246. The inclined regions 266thus separate an operative region defined by the region 264 from twoinoperative regions defined by the region 262.

A hub 268 is rotatably mounted to the spindle 240 below the plate 246. Alever 270 is located between the hub 268 and the plate 246. A pair ofpins 272 extend from the lever 270 into lugs 274 that are secured to thehub 268 to thus pivot/ally mount the lever to the hub in such a mannerthat the lever is rotatable with the hub. A first end of the lever isresiliently urged upwardly about the axis of the pins 272 by acompression spring 275 interposed between the lever and the hub tothereby resiliently urge a follower in the form of a ball 276, securedto this end of the lever, against the bottom of the plate 246. The otherend of the lever 270 extends between a pair of pins 277 mounted on avalve stem 278. The valve stem 278 is mounted for heightwise movement inthe hub 268.

A nozzle 280 extends radially from the bottom of the hub 268 on theopposite side of the hub from the ball 276. The nozzle 280 communicateswith passages 282 and 284 in the hub. The valve stem 278, which extendsinto the passage 284, in its lower FIG. 5 position blocks communicationbetween the passages 282 and 284 and when raised from the HO. 5 positionto an open position permits communication between these passages. Thepassage 284 is in communication with a groove 286 formed on theperiphery of the spindle 240, and the groove 286 is in communicationwith ports 288 and 290 formed in the spindle 240 and the flange 239. Theport 290 is in communication with a nipple 292 that is threaded into theflange 239.

Referring to FIGS. 3 and 9, a gear 294, secured to the hub 268, is inmesh with a gear 296. The gear 296 is mounted to a shaft 298 that formspart of an air actuated motor 300 that is mounted to the housing 238.The motor 300 comprises end compartments 302 and 304, a large middlecompartment 306 and a small middle compartment 308. The shaft 298extends into the end compartment 302 and a shaft 310 is rotatablymounted in the compartment 304. A wall 312 separates the compartment 302from the compartments 306 and 308 and a wall 314 separates thecompartment 304 from the compartments 306 and 308. Sprockets 316 and318, respectively mounted to the shafts 298 and 310, are drivinglyconnected by an endless chain 320. One run of the chain 320 extendsthrough relatively large openings in the walls 312 and 314 and throughthe compartment 306 and has a relatively large diameter piston 322secured thereto that bears against the periphery of the compartment 306.The other run of the chain 320 extends through relatively small openingsin the walls 312 and 314 and has a relatively small diameter piston 324secured thereto that bears against the periphery of the compartment 308.

As shown in FIGS. 1 and 2, a cement melting and pumping mechanism 326 ismounted to the machine frame. Referring to FIG. 10, the mechanism 326,which is constructed similarly to the mechanism of application Ser. No.840,291 filed July 9, I969, comprises a chamber 328 located beneath afunnel 330. A chamber 332 is located below and in communication with thechamber 328. The chamber 332 is in communication with a passage 334 thatintersects a heightwise extending bore 336. A tube 338, fitted in thebore 336, has a port 340 that is in communication with the passage 334.An air operated motor 342 is mounted to the tube 338. The piston rod 344of the motor 342 is connected to a plunger 346 that is slidably mountedin the tube 338. A port 348 in the bottom of the tube 338 is normallyclosed by a ball valve 350 that is located in an orifice 352. Acompression spring 354 acts to yieldably urge the ball valve 350 intoits normal closing position with respect to the port 348. A port 356provides communication between the orifice 352 and one end of a flexiblehose 358.

The end of the hose 358 remote from the mechanism 326 is connected to afilter 360 (FIGS. 2-4), and the filter 360 is in communication with theport 290 (FIG. 6) by being mounted to the nipple 292 (FIG. 4).

In the idle condition of the machine: pressurized air is entering theend compartment 304 of the motor 300 through a line 368 while the endcompartment 302 is vented to atmosphere through a line 370 to cause thepiston 322 to abut the wall 312 and the piston 324 to abut the wall 314and thus cause the hub 268 and the lever 270 to be turned to a positionwherein the ball 276 bears against the higher region 262, as seen inFIGS. 5 and 7, with the valve stem 278 blocking communication betweenthe passages 282 and 284 (FIG. 5); and the piston rod 344 is retractedinto the motor 342 so that the plunger 346 is above the port 340.

Granules of thermoplastic cement, that are solid at ambient temperaturesand become molten and adherent when heated above a predeterminedtemperature, are placed in the funnel 330 of the mechanism 326 andgravitate through the chamber 328 into the chamber 332 where they aremelted by an electric cartridge heater 372 (FIG. The molten cementgravitates from the chamber 332 through the passage 334 and the port 340into the tube 338 to fill that portion of this tube that extends betweenthe plunger 346 and the ball valve 350. The motor 342 is now actuated toreciprocate the plunger 346 a number of times and thus pump the moltencement from the tube 338 through the orifice 352, the port 356, the hose358, the ports 290 and 288, and the groove 286 into the passage 284until it fills the passage 284. During each downstroke of the plunger346, the movement of the bottom of the plunger below the port 340 causesthe ball valve 350 to open and the cement in the tube 338 to be pumpedthrough the port 348 into the orifice 352. During each upstroke of theplunger 346, the movement of the bottom of the plunger above the port340 enables cement to flow through the port 340 to fill that portion ofthe tube 338 that lies between the bottom of the plunger and the ballvalve 350. At the end of these recipro-cations, the plunger reassumesits idle position above the port 340. An electric heater (not shown) islocated in the hose 358 and an electric heater 374 (FIG. 5) is locatedin the flange 239 to maintain the cement molten between the tube 338 andthe passage 284.

Referring to FIGS. 11 and 11A, a shoe assembly comprising a last 376having an insole 378 secured to its bottom and an upper 380 mountedthereon is placed bottom-up on the last support constituted by the lastpin 150 and the plate 148 with the pin 150 entering the thimble hole ofthe last and the plate 148 bearing against and supporting the top of theheel portion of the last. Preferably, a pulling over and toe lastingoperation has previously been performed on the shoe assembly in amachine such as that shown in patent application Ser. No. 858,667 filedSept. 17, 1969.

In the manner shown in the aforementioned parent application Ser. No.4l,500 filed May 28, l970, the machine is operated to bring it to theposition illustrated in FIGS. 11 and 11A wherein: the shoe assembly isclamped between the plate 148 and the hold-down feet 242, 244 of theapplicator-hold-down unit 235 with the heel seat portion 409 of theinsole 378 bearing against the feet 242, 244; the toe rest bears againstthe top of the vamp of the upper; the pad 172 firmly engages the shoeassembly and clamps the heel portion of the upper 380 against the last376 with the heel portion 428 of the upper margin extending upwardly ofthe insole heel seat portion 409; and the wipers 12 are locatedproximate to the shoe assembly in position to commence a heel wipingoperation.

Prior to the machine parts arriving at the FIGS. 11 and "A position, themotor 342 was actuated to lower the plunger 346 and thus force cementunder pressure into the hose 358. The valve stem 278 prevents the cementfrom exiting from the passage 284 at this time, so that the cementpressure caused by the lowering of the plunger 346 is taken up by theelastic wall of the hose 358.

At this time, the end compartment 304 of the motor 300 is vented toatmosphere through the line 368 and pressurized air is forced into theend compartment 302 through the line 370 to cause the piston 322 to movefrom the wall 312 to the wall 314 and the piston 324 to move from thewall 314 to the wall 312. This causes the top run of the chain 320, asseen in FIG. 9, to move rightwardly and, through the connection providedby the sprocket 316 and the gears 294, 296, causes the hub 268 and thelever 270 to swing counterclockwise,

as seen in FIG. 7, about the axis of the spindle 240, through apredetermined arc. The swinging movement of the hub 268 and the lever270 is terminated when the piston 312 engages the wall 314 and thepiston 324 engages the wall 312. During this swinging movement the ball276 moves along the higher region 262, down the uppermost inclinedregion 266, as seen in FIG. 7, about the lower region 264, up thelowermost inclined region 266 and back to the higher region 262. At thebeginning of the swinging movement, the ball 276 lies above thelongitudinal center line of the machine, as seen in FIG. 7, and at theend of the swinging movement the ball 276 lies below the longitudinalcenter line of the machine. The angles defined by a line extending fromthe ball 276 to the axis of rotation of the hub 268 and the longitudinalcenter line of the machine at the beginning and the end of the swingingmovement are equal. During the period that the ball 276 moves along thelower region 264, the valve stem 278 is lifted by the lever 270 to opencommunication between the passages 282 and 284 and enable the cementunder pressure in the passage 284 to be sprayed radially from the nozzle280.

From the foregoing, it can be seen that no cement is sprayed from thenozzle 280 during its movement through the inoperative zones at thebeginning and the end of the swinging movement of the hub 268 whilecement is sprayed from the nozzle during its movement in an operativezone in an intermediate portion of this swinging movement. The cement isdeposited on the upper margin 428 and/or the periphery of the insoleheel seat portion 409 and acts to bond the upper margin to the insoleduring the below described wiping of the upper margin against theinsole. The angular extent of the operative zone during which the cementis sprayed is dependent on the length of the lasting margin that is tobe wiped against the insole, and this in turn is dependent on the lengthof the shoe assembly. ln order to adjust the angular extent of theoperative zone for the particular length of the shoe assembly beingoperated on, the plate 246 is adjusted forwardly or rearwardly by theknob 260 to move the inclined zones 266 forwardly or rearwardly to thedesired position.

After the cement spraying operation is completed, the wipers 12 aremoved forwardly and inwardly so as to wipe the upper margin 428 againstthe insole heel seat 409 and bond the upper margin to the insole bymeans of the sprayed cement. During the wiping operation, theapplicator-hold-down unit 235 is raised out of the way of the wipers 12.

After the completion of the machine cycle, the end compart-ment 302 ofthe motor 300 retains pressurized air through the line 370 and the endcompartment 304 remains vented through the line 368. During the nextmachine cycle, when the cement is to be sprayed out of the nozzle 280,the hub 268 is caused to swing from the position it assumed at the endof the first machine cycle back to the position it had assumed at thebeginning of the first machine cycle.

l claim:

1. A cement applying mechanism comprising: a nozzle mounted for swingingmovement; means for swinging the nozzle through a prescribed are; meansfor supplying cement to the nozzle; a control means having a firstinoperative region and a second inoperative region that are separated byan operative region, a follower means, mounted for swinging movementwith the nozzle, coactive with the control means during the swinging ofthe nozzle through said are to first coact with the first inoperativeregion, then coact with the operative region and then coact with thesecond inoperative region; means so constructing the nozzle, thefollower means and the control means as to preclude the spraying ofcement from the nozzle when the follower means is coacting with saidinoperative regions and to permit the spraying of cement from the nozzlewhen the follower means is coacting with said operative region to thusprovide inoperative zones at the beginning and the end of the swingingmovement of the nozzle through said are in which cement is not sprayedfrom the nozzle and an operative zone that is between said inoperativezones during the swinging movement of the nozzle through said are inwhich cement is sprayed from the nozzle; and means for so adjusting thecontrol means so as to adjust the angular extent of the operative andinoperative zones.

2. A mechanism as defined in claim 1 further comprising: a hub, mountedfor swinging movement, having the nozzle incorporated therein; means forswinging the hub through said prescribed arc to thereby swing the nozzlethrough said prescribed arc; and a passage in the hub in communicationwith the nozzle; wherein said means for supplying cement to the nozzlecomprises: means for supplying cement under pres-sure to the passageduring said swinging of the hub; further comprising: a valve mounted tothe hub for movement between a blocking position wherein it blockscommunication between the passage and the nozzle and an open positionwherein it permits communication between the passage and the nozzle;wherein said follower means comprises: a follower mounted to the hub forswinging movement therewith and for movement with respect thereto soconnected to the valve as to effect movement of the valve between saidpositions; wherein said control means comprises: valve operating meanseffective to initially maintain the valve in said blocking positionduring the movement of the nozzle through the inoperative zone at thebeginning of said swinging movement of the nozzle, to move the valve tosaid open position during the movement of the nozzle through saidoperative zone, and to return the value to said blocking position duringthe movement of the nozzle through the inoperative zone at the end ofsaid swinging movement of the nozzle; and wherein said means foradjusting the control means comprises: means for adjusting the valveoperating means to adjust the positions in said swinging movement inwhich the valve moves from the blocking position to the open positionand from the open position to the blocking position.

3. A mechanism as defined in claim 2 wherein said valve operating meanscomprises: a plate having said inoperative and operative regions; meansyieldably urging the follower against the plate; and means so connectingthe follower and the valve that when the follower is bearing against theinoperative regions the valve is in said blocking position and when thefollower is bearing against said operative region the valve is in saidopen position; and wherein said means for adjusting the valve operatingmeans comprises: means for so adjusting the plate with respect to thehub as to adjust the positions in said swinging movement in which thefollower is bearing against said inoperative and operative regions.

# i I I

1. A cement applying mechanism comprising: a nozzle mounted for swingingmovement; means for swinging the nozzle through a prescribed arc; meansfor supplying cement to the nozzle; a control means having a firstinoperative region and a second inoperative region that are separated byan operative region; a follower means, mounted for swinging movementwith the nozzle, coactive with the control means during the swinging ofthe nozzle through said arc to first coact with the first inoperativeregion, then coact with the operative region and then coact with thesecond inoperative region; means so constructing the nozzle, thefollower means and the control means as to preclude the spraying ofcement from the nozzle when the follower means is coacting with saidinoperative regions and to permit the spraying of cement from the nozzlewhen the follower means is coacting with said operative region to thusprovide inoperative zones at the beginning and the end of the swingingmovement of the nozzle through said arc in which cement is not sprayedfrom the nozzle and an operative zone that is between said inoperativezones during the swinging movement of the nozzle through said arc inwhich cement is sprayed from the nozzle; and means for so adjusting thecontrol means so as to adjust the angular extent of the operative andinoperative zones.
 2. A mechanism as defined in claim 1 furthercomprising: a hub, mounted for swinging movement, having the nozzleincorporated therein; means for swinging the hub through said prescribedarc to thereby swing the nozzle through said prescribed arc; and apassage in the hub in communication with the nozzle; wherein said meansfor supplying cement to the nozzle comprises: means for supplying cementunder pres-sure to the passage during said swinging of the hub; furthercomprising: a valve mounted to the hub for movement between a blockingposition wherein it blocks communication between the passage and thenozzle and an open position wherein it permits communication between thepassage and the nozzle; wherein said follower means comprises: afollower mounted to the hub for swinging movement therewith and formovement with respect thereto so connected to the valve as to effectmovement of the valve between said positions; wherein said control meanscomprises: valve operating means effective to initially maintain thevalve in said blocking position during the movement of the nozzlethrough the inoperative zone at the beginning of said swinging movementof the nozzle, to move the valve to said open position during themovement of the nozzle through said operative zone, and to return thenozzle to said blocking position during the movement of the nozzlethrough the inoperative zone at the end of said swinging movement of thenozzle; and wherein said means for adjusting the control meanscomprises: means for adjusting the valve operating means to adjust thepositions in said swinging movement in which the valve moves from theblocking position to the open position and from the open position to theblocking.
 3. A mechanism as defined in claim 2 wherein said valveoperating means comprises: a plate having said inoperative and operativeregions; means yieldably urging the follower against the plate; andmeans so connecting the follower and the valve that when the follower isbearing against the inoperative regions the valve is in said blockingposition and when the follower is bearing against said operative regionthe valve is in said open position; and wherein said means for adjustingthe valve operating means comprises: means for so adjusting the platewith respect to the hub as to adjust the positions in said swingingmovement in which the follower is bearing against said inoperative andoperative regions.